Sec. 21.401  Scope of service.

    Developmental authorizations may be issued for:
    (a) Field strength surveys relative to or precedent to the filing of 
applications for licenses, in connection with the selection of suitable 
locations for stations proposed to be established in any of the 
regularly established radio services regulated by the rules of this 
part; or
    (b) The testing of existing or authorized antennas, wave guides, or 
transmission paths.
[ 44 FR 60534 , Oct. 19, 1979, as amended at  52 FR 37784 , Oct. 9, 1987]